u cant!
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The magic broom is a reward for the Halloween quest "Swept away". The quest is no longer available to free players, but members can still complete the quest and get the reward.
I have posted a link below that should help answer your question.
broom
Strength, magic or range an attack all at least 70+.
All over towns.
gecko's eat flies and you can buy flies in pet shops all over runescape
Their are shield shops all over Runescape. You should be more specific.In North Falador near the fountain.
depends for slayer dart you have to use slayer staff. for iban blast you need staf of iban but i think the best magic weapon over all is masters wand. or ancient staff
Ice Barrage hits 30 on multiple opponents that's all I know.
Depends on who you are fighting, if you're fight someone with magic then you should have range gear. if the have melle, magic would be the strongest, and if the have range melle would be the strongest. all of these have exceptions.
all over not hard to find
green= range blue= magic red= melee black= all the above
Prayer, Magic, Attack, Defense, Strength, Range, and Constitution all affect your Combat level (the level that people see when they roll their mouse over you). You can raise any of these to help you, as you put it, level up.